Air-flow equipped turning bar for web material

Advancing material of indeterminate length – By orbitally traveling material-engaging surface – Including details of roll or mount

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Details

B65H 2332

Patent

active

044923287

ABSTRACT:
To provide for a tight seal upon selectively closing air exit openings from a compressed air-supplied tubular turning bar, a preferably endless tape or ribbon is moved within the bar, the ribbon having a slit of about half its length, for selectively positioning a solid portion or the slit opposite the air exit openings. The tape or ribbon can be positioned by a follower to which it is clamped, located on a rotatable spindle; or coupled to externally positionable deflection rollers. The excess air pressure within the interior of the tube seals the tape against the portions of the inner wall of the tube in the regions where the slit is absent.

REFERENCES:
patent: 1630713 (1927-05-01), Meyer
patent: 1650927 (1927-11-01), Barber
patent: 2852253 (1958-09-01), Pouliart et al.
patent: 3057079 (1962-10-01), Schmidt
patent: 3181174 (1965-04-01), Griffioen et al.
patent: 3266690 (1966-08-01), Goettsch
patent: 3599851 (1971-08-01), Hedlund et al.
patent: 3744693 (1973-07-01), Greiner
patent: 3962799 (1976-06-01), Lapointe et al.
patent: 4043495 (1977-08-01), Sander
patent: 4406388 (1983-09-01), Takashi et al.
Oskar Frey, Polygraph-Verlag, 1979, p. 56.

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